Cannot connect to Oracle listener on Virtual PC

Hi all, from my Win7 host, I cannot connect to port 1521 for Oracle 11g SE running under a virtual PC running in XP mode. Neither SQL-Plus nor SQL Developer get a connection, although the db is running and locally reachable as tested with SQL-Plus on the guest system. SQL Developer says ”The network Adapter could not establish the connection.” TNSPING says "no listener". So far I’ve opened port 1521 in the Virtual PC’s windows firewall and also allowed SQL Developer through the firewall of the Win7 host. Ping to the VM server works so network is ok (I used the MS loopback Adapter) but port 1521 is not accessible from the host. Any ideas?

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Ping to the VM server works...
You should clearly understand that you never ping a "server". You always ping an "address" even if it's an address by name. What address was pinged?
(I used the MS loopback Adapter)
Used it for what? Used it how?
Tom

"Ping to the VM server works so network is ok"
Which machine is the "VM server" in this case ? As far as I remember, by default an XP MODE virtual machine is not reachable via TCP/IP from the host. The integration features are not implemented via TCP/IP.
Can you ping the IP adddress of the XP MODE virtual machine from the host ?

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